The first thing I did was get a head that was not repairable and have it cut into sections.That way You know where You can grind and where not to grind.Avoid heads with alot of rust in the water jackets.Street Rodder Magazine in the late 1970s had a story on porting 235-261 cylinder heads.
EvilDr235

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Two types of people drive old cars.Rich people because they want to and poor people because they have to.
Remember EvilDr235 has a cure for Your sixness.